Sore nipples with iud

I have had my Mirena for 5 months and just this week I have been experiencing really sore nipples just when I touch them. I am not pregnant as the last time I had sex was 3+ weeks ago and I have had 2 negative tests. Anyone else experience this randomly?

also according to the app it’s my ovulation time so I don’t know if that has to do with It? Never had this before.